Probably not the best idea to run it without thoroughly cleaning inside, under the keys, drying it off before putting electricity through it.

Did you remove the battery and cut any and all power to it as soon as the water touched it? I'm surprised it works and responds correctly for the 10 minutes at first now.

Not to give you the dreaded "Use the search button" answer but I'm afraid that's the best advice I can give you. There was a recent post about spilling wine onto a keyboard, which is surely worse than your case of plain water. They might have found a good solution on that thread. Check it out.